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Explore Jarrett Dunn's views on sourcing components for a solar car telemetry system, examining multiple providers for sensors, microcontrollers, and processors, along with pros and cons. Understand essential parts for successful implementation and best practices for reliable data collection.
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Solar Car Challenge Telemetry Jarrett Dunn
Agenda • Sources • Communications • Sensors • Practical Example
What to look for in a Source • Documentation • Reliability • Customer support • Lead time
Sources • Aliexpress • High Failure rate • Long shipping times • Little to no documentation • Cheap!! • Ebay • Unknow sources • Questionable quality • Cheap • Adafruit • Reliable • Excellent documentation • Fast shipping • Expensive!!! • Sparkfun • Reliable • Good tutorials • Expensive *** These are Jarrett’s opinions. The Solar Car Challenge does not endorse any of these companies or products***
Essential Parts • Sensors • Processor • Transmission Method • Storage Method • Display
Sensors • Voltage • ADS1115 ($15 Adafruit) • 16 bit • Programmable gain • Speed ($40 Adafruit) • MTK3339 • Temperature ($5 Adafruit) • MCP9808 • Current • Hall Effect ($30 Aliexpress) • Shunt ($22 Digi-Key)
Micro Controllers Pros Real time controllers Single loop Low Speed 8-120 Mhz Limited Memory Cons • Real time controllers • Single loop • Cheap • Easy to program • Lowe Power usage
Micro Controllers • Examples • Arduino • ARM and AVR processor family • Parallax • Basic Stamp • Propeller • Texas Instruments • MSP430 • Simple Link
Micro Computer Pros Cons Expensive Large power requirement Multiple threads/processes Difficult to program Multiple threads/processes • Fast 1 GHz+ • Large Memory • Large Storage • Multiple Threads/Processes
Processor • Raspberry Pi Zero W ($10 Multiple) • I2C Network • Serial Communications • Built in Wifi • HDMI • Substantial Storage
Transmission Wifi Cell
Storage Hosts Database
Display Database